The Taittiriya
Upanishad belongs to the Taittiriya school of the Yajur Veda. It is divided
into three sections called Vallis. T he first is the Siksa Valli. Siksa
is the first of the six Vedangas (limbs or auxiliaries of the Veda); it
is the
science of phonetics and pronunciation. The second is the Brahmananda Valli and the
third is the Bhrugu Valli. These two deal with the knowledge of the Supreme Self,
paramatma-jnana.